I really like this game. I actually played it all the way through a bunch of times.

It's fun.

I ended up usually getting a power upgrade and a speed upgrade on a few towers in the later levels and never getting the range upgrade, though I'm not sure that's actually what's optimal. Are there any stats on the damage that different things do?

My biggest problem was that I kept trying to click on the towers but since they are raised off the ground, I often click on a tile behind the one I mean to.

The only other thing was that sometimes I had a good setup and just had to wait a while for the creeps to finish going through the towers. Would be nice to have a >>ffwd button!